Thanks for your question on Healthcare Magic.
I can understand your concern.
Yes,
blood in stool is serious condition and you should definitely
consult gastroenterologist for this.
Blood in stool can cause anemia (low
hemoglobin level) and this anemia can cause breathlessness and chest pain.
So better to consult gastroenterologist and get done
1.
Complete blood count (CBC) to know hemoglobin level
2. Lower GI (gastrointestinal) scopy for the search of bleeding site.
If hemoglobin is very low then you might need
blood transfusion and iron tablets.
Also get done chest x ray to rule rule out lung related cause for breathlessness and pain.
Don't worry, you will be alright.
First diagnose yourself and then start appropriate treatment.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.